How We
Calculate

Our Approach

Our calculator uses a multi-factor model that accounts for location, build size, quality level, and specific features. Each factor is calibrated against published industry data.

Location Tiers

Construction costs vary significantly by suburb. We classify suburbs into tiers based on their distance from the CBD, local council fees, and typical site conditions.

Cost Components

• Base construction: Per-square-metre rates by quality tier
• Site costs: Demolition, excavation, retaining walls
• Council fees: Planning permits, building permits, levies
• Professional services: Architect, engineer, surveyor
• Fixtures & finishes: Kitchen, bathroom, flooring upgrades

Data Sources

See our Data Sources page for a full list of the publications and industry bodies we reference.

Accuracy

Our estimates aim to be within 10-15% of actual build costs for standard projects. Always obtain multiple builder quotes for the most accurate pricing.